In this sequel to “Ringworld” and “Ringworld Engineers,” the ring is still home to many alien species. The last Puppeteer is still manipulating those he can, and Louis Wu must meet even more new challenges and solve more technological...
The setting of Niven’s 1984 novel The Integral Trees was striking and imaginative, even for this acclaimed world builder; it’s well worth the second visit made in this sequel. Around a neutron star an envelope of gas holds a breathable...